Machine for knotting nets



Oct. 14 1924.

w. c. BR'O CKER MACHINE FOR KNOTTING NET S Filed Aug. 30

1921 4 Sheets-Sheet l Oct. 14 1924. 1,511,553!) w. c. BRb'cKER' MACHINE FOR KNOTTING NETS Filed Aug; 30. 1921 4 Sheets-Sheet 2 Fig. 1?.

w. c. ,BRQCKER v MACHINE FOR KNOTTING NETS FiIed A112. 50 1921 4 She ets-Sheet 5 .BY/Zq arm NEYs WWWPZZM Oct. 14' p 1924. 1,511,589

w. c. BRCKER MACHINE FOR KNOTTING NETS Filed Aug. 30. 192] 4 Sheets-Sheet 4 INVENTIOR WZZE/P c. BRiic/rm BY HTTORNEYJ Patented Oct. 14, 1924.

PATENT OFFICE.

WALTER G. BRGCKER, 0F ITZEHOE, GERI/LANY.

MACHINE FOB KNOTTING NETS.

Application filed August 30, 1921.

To all whom it may concern:

Be it known that I, WVALTER G. BRooKER, residing at Itzehoe, Brookhafen, Germany, have invented certain new and useful Improvements in and Relating to a Machine for Knotting Nets, of which the following is a specification.

This invention relates to a machine for making knots and particularly to a machine for producing nets from series of threads, the one series or warp threads being moved or guided by needles while the other series are actuated by means of shuttles.

One feature of the invention consists in arranging the shuttles so that their openings, from which the shuttle threads issue, lie near the point where the knots are made and swing to and fro around the knotting points. The center of the arc described by the oscillating shuttles preferably lies near the knotting point.

Another feature of the invention consists in imparting to the shuttles, in addition to the primary oscillating motion already described, a secondary motion by which the opening from which a shuttle thread issues is moved away from the knotting point at the moment in which the shuttle commences to execute its backward swinging motion. This may be accomplished by arranging the shuttles to be moved in a rocker arm adapted to swing around an axis or pivot lying adjacent the knotting point, and by pivotally attaching the shuttle support to this arm, and arranging the shuttle support to swing around its pivot in the rocker arm by means of a crank or the like.

Another object of the invention is to avoid the unsymmetrical meshes produced by previously known net-making machines and to provide a simple arrangement for producing symmetrical meshes. The means by which this is accomplished in accordance with the invention consists of turnable hooks which, after seizing the shuttle threads, are turned so as to form loops in them. These looping hooks are arranged toturn alternately to the right and left, and the arrangement of the working parts of the machine is such that the knots are formed at the points of the hooks. By this means the spots where the knots are formed are shifted alternately to opposite sides of a middle line. The warp threads are shifted in a corresponding manner to the left and right of the middle line by their needles. In

Serial No. 497,074.

accordance with the invention the alternate lateral displacements of the warp threads during the up and down mot-ions of the needles is effected automatically.

The invention is shown in the drawing in which:

Fig. 1 is a side view, partly in section, of the parts of the machine whose illustration is necessary for a comprehension of the operation of the moving parts of the machine.

Fig. l is a front view, partly in section, of a part of the machine.

Figs. 2 and 3 illustrate the manner in which the knots are formed.

Figs. 4 to 8 illustrate the motions of a shuttle, the corresponding looping hook and needle during one complete oscillation or to and fro movement of a shuttle.

Fig. 9 illustrates the symmetrical meshes formed with the aid of the looping hooks according to this invention.

Fig. 10 shows the looping hooks in two diiferent positions.

F 11 is a front view showing the needle carrier.

Fig. 12 is a side view of Fig. 11.

Fig. 13 is a top view of Fig. 11.

Referring to Fig. 1, it will be seen that the warp threads a pass'over a drum or roller 0 to needles d. The woof threads Z) issue from circular enclosed bobbins f supported in shuttles g. Knots are formed with the warp and woof threads at points 6, hereinafter called knotting points. against thin disks it connected to each other by a link member which is hook-shaped at its two ends and is attached to a U-shaped support h. The support It bears the holding disks h of all of the shuttles in a row or group. The support it is fixed to an end plate h which is arranged to turn on a pivot mjournalled in a lever g. The lever Q is also arranged to turn on a pivot n located near the knotting point e. The short arm g of the lever q is linked to a connecting rod 0 to which reciprocating motion is imparted by an excentric 0 rotated by a shaft- 0. The end plate 71 is linked to a connecting rod n which is reciprocated by an excentric n rotated round the pivot a. The finished net produced by the machine is delivered by delivery rollers Z or the like.

Arranged near the knotting points is a row of hooks 7c which are adapted to seize the shuttle threads and to then execute a turning motion for the purpose of forming The shuttles 9 lie loops in the threads. "The looping hooks are formed as shown in Fig. 10 so that when they are turned to the right the positions of their points differ from the positions which they occupy when the hooks are turned to the left. The knots are formed at the points of the hooks J0.

The manner in which the knots are formed is illustrated in detail Figs. ,2 and .3. After 2a hook is has seized a shuttle thread '12., and then executed a turn so as to form a loop as shown in Fig. 2,.a needle dcarries a warp thread-a through the loop in the thread 6. Then the shuttle passes through the loop :fonmed by the needle in the thread a whereupon the'iknot is tightened as indicated in Fig. 3.

.Figs. 4 to 8 illustrate the motions executed byaineedle wZ,-a-shutt'-le gand a hook it. On observing the motions of the :eye ithrough which the shuttle thread passes out of the enclosed bobbin, it will be noted that in the positionsshown :in Figs. 4C-6 this eye swings round the iknotting point By thus arranging :the eye to swing around the knotting point, the length :oi shuttle thread be tween the iknotting point and the eye 2' can he im uchrshorter than it the shuttle is moved past the knotting point :in the manner fadoptedin known machines. In Fig. 6 the shuttle is in the position in which it com- IHIBHGBS to swing-backward. .At thismoment the eye i from which the shuttle thread issues receives a'secondary motion by which, in spite of the shuttle being bodily swung to :thezright-as indicated bythe arrows iuFigs. 6:and 7,-the-eye is moved toward the left, ire-away from the knotting point. this secondary motion the knot is tightened. During this tightening of the knot the shuttlethread passes ata sharp angle around the-corners" 20143118 eye inrthelbobbin holder, and in this way suflicient friction between *thethread-and the-bobbin holder is'obtained, withoutithe-aid-ofspecial clamping devices, thus enabling the thread to exert the necesisaryipull dortig'hteningthe knot. When the :s'aidgpull istexerted thehook 7c is turned into ithe :position shown in Fig. 7, ifrom which it willhe observedthatthe knot is formed at the point not .the hook.

vTllhe'needles d asshown in :Figs. 1 and .11 .idep'en'd from a support 1" adapted to slide to and ifro horizontally in -a-reciprocating slide 8. The slides moves up and down between ilateral vertical guides 81, motion being ,i1nparted :to .it by "an excentr ic rotating with the sha ft o, Fig. 1. The needle carrier a has oblique end-surfaces;2, :t, Fig. :11, these surfaces lying in the path of movable ltappets u and a, whichmay be brought into,

and \WlllhClI-ZUND :from engagement with the endisurfaces.

QThetappetsgu: and .u, as will appear from Fig. 12, are linked to double arm levers 09,

:19 which can .be rocked by ether ttwn arm levers g y, Fig. 13. The ends of the lever 3 are pivotally connected to pins Q), to which are adapted to slide to and fro in holes in the left hand guide member 8, while the ends of the lever g/ are pivotally attached to sliding pins 0), w in the right hand guide member s". "The levers y, y are oscillated by the needle carrier 1 with .the aid of the sliding pins. The :inner "face of the needle carrier 7' has two slots :2, a" which permit of the carrier rsliding past the protruded ends of the pins w, w .at certain times. Th i trivan ce for shifting the needle carrier later ally to and fro operates as 'fdlloWs When the needle .carrier 1" moves down ward from the position shown in Figs. .12 and 13 its .inner face strikes against th rounded protruding end of the pin 10"., and thus swings the lever y" out .of the, ,osition shown in Big. v13, whereby the rig-it arm of the levery swiings the leverwout fo'f the position shown in Fig..12,.so that the tappet u is moved until itslprotmdingiend is Tflush with the frontsurface oft .therighthand vertical guidemeinber 3. ,At the. same time the slot e at'the left hand of the needle .Qarrier ,7 slides-over the protruding end of the pin .10 while the protruding end of the pin ruis pushed back by :the needle carrier 77. "-"ilhe receding pin a swings back the left hand end o'fthe lever y. Thisagain results "in the til-tingof the lever m, whichshi'fts out the .tappet u, so that it will engage with the end surface tofthe meedlecarrier when -this latter is moved upwards. The needle carrier is thusshifted to the right. At the end of its nextdownand ,up motion it will be shifted to .the :left by :the protruding end of .the tappet uand so forth.

1. In a knot -.m aking machine Ttorjknotting together series of threads, means itor .pro- .ducing :knots at a certain knotting point, said means comprising a shuttlewi-th an exit foronerof the said threads means "for imparting a .primanyarc uate motion to the 2. In a knot-makingmachine foriknotting itogethenseries of threads, means .forproducing :knotsat a certain'knotting point, said means comprisinga shuttle with .an exit for one of thesaid .threads, .means .for inipalt ing a primary oscillating arcuate motion to the shuttle around the iknotting point, and means for imp arting; a secondary motion {to 3. In .a knot-making machine for knotting together series of threads, -means for producing knots at a certalnknotting'po'int,

shuttle around the kn otting point, and .means for impartinga secondary .motion to thesaid shuttle whereby arseco-n'dary moti n ;is imparted .to the said .eXit.

said means comprising a rocker arm with its pivot close to the knotting point, a shuttle with an exit for the thread therein, a shuttlecarrier pivotally mounted on the rocker arm, means for rocking the rocker arm, and means for turning the shuttle-carrier where by the exit of the shuttle is moved away from the knotting point at the moment when the movement of the rocker is reversed after the formation of a loose knot.

at. In a knot-making machine for knotting together series of threads, means for producing knots at a certain knotting point, said means comprising a shuttle with an exit for one oi the said threads, a rocker arm with a pivot close to the knotting point, a shuttle carrier pivotally mounted on the said rocker arm, a reciprocating rod for oscillating the rocker arm, and a second reciprocating rod for moving the exit of the shuttle in the shuttle carrier away from the knotting point at a moment when the movement of the rocker arm is reversed after the formation of a loose knot.

5. In a knot-making machine for knotting together series of threads, means for producing knots at a certain point, said means comprising a shuttle with an exit for one of the said threads, a rocker arm with a pivot close to the knotting point, a shuttle carrier pivotally mounted on the said rocker arm, a reciprocating rod for oscillating the rocker arm, a second reciprocating rod for moving the exit of the shuttle in the shuttle carrier away from the knotting point at a moment when the movement of the rocker arm is reversed after the formation of a loose knot, and a revolving member for operating the said second reciprocating rod the pivot of the revolving member coinciding with the pivot of the rocker arm.

6. In a knot-making machine for kno'tting together series of threads, means for producing knots at a certain knotting point, said means comprising a thread feeding needle adapted to move one of the said threads, a needle carrier, means for reciprocating the needle with its carrier, movable engaging members for engaging the needle carrier, and surfaces which engage with the said engaging members made to produce transverse motion of the needle carrier when they engage with the engaging member.

7 In a knot-making machine for knotting together series of threads, means for producing knots at a certain knotting point, said means comprising a needle, a needle carrier, means for reciprocating the needle with its carrier, a turnable hook, and means for turning the point of the hook to opposite sides of the said needle, the direction of travel of the point of the hook being the opposite of that of the needle-carrier.

S. In a net knotting machine, two series of means for supplying threads, other means for knotting together the threads supplied by the two series, and a series of hooks each hook being adapted to be turned round its axis into two different positions to cooperate in both positions with a thread of one of said series, and alternately with two different threads of the other of said series, the hooks being so arranged and shaped that the threads may be held on the points of the said hooks when the knots are tightened.

9. In a net knotting machine, two series of means for supplying threads, a series of hooks each hook being adapted to be turned round its axi into two different positions to cooperate in both positions with a thread of one of said series, and alternately with two different threads of the other of said series,

and other means for knotting together thethreads from the two series of means on the points of the said hooks, the hooks being so arranged and shaped that the points of the hooks are displaced when the latter are turned so as to displace the knotting points of the threads.

In testimony whereof I have affixed my signature in presence of two witnesses.

WALTER o. BBooKER.

Witnesses HERM. KELTING, A. HARHINKE. 

